Kabushiki Kaisha Toshiba

Tokyo Shibaura Denki Kabushiki Kaisha

Toshiba Corporation

Yasuo Abuyama

Fumito Ide

Takeshi Sanbayashi

Osamu Hamanaka

Akihiko Someya

Yoshio Watanabe

Atsushi Murakami

Eiichi Yamanishi

Katsumi Kimoto

Toshiyuki Sogo

The immigration system includes a travel document insertion port for accepting a travel document retaining individual information which specifies a bearer, a reader for reading individual information from the travel document inserted into the insertion port by a bearer, an acquiring portion for acquiring the bearer's biological information, and a collator for collating the individual information acquired by the acquiring portion with the individual information read from the bearer's travel document by the reader. Further, the system includes an examination portion for examining the passing of a bearer for approval or disapproval based on the result of collation in the collator, a passing ticket issuer for issuing a passing ticket to the bearer who is approved to pass, and a gate for approving the passing of a traveler by accepting the inserted passing ticket issued from the passing ticket issuer.

Passing examination system & passing examination method

In an image forming device including an image reading device, dot signals for one scanning line are detected by a CCD sensor. After their A/D conversion and shading-correction, the detected signals are supplied to a comparison processor. In the comparison processor, the dot signals corresponding to the leading and tailing edges of the original are detected from the dot signals for the one scanning line. The rest of the dot signals are judged to be those other than from the original in the selector, and converted into white dot signals. Consequently, the region other than the original is formed in white for each line. Thus, regardless of the original sheet size, or even if the sheet is obliquely placed, the region other than the original can be detected, and the region can be erased by adding a white background.

Image reading device for removing the background of a scanned original

An image forming apparatus is provided with a developing device for developing a latent image formed on the surface of the photosensitive drum. The developing device includes a first developing unit for developing the latent image by use of a first color developing agent and a second developing unit for developing the latent image by use of a second color developing agent. The first and second developing units are selectively driven and devices for inserting/removing the first and second development units are also provided. The image forming apparatus has a selecting device for interrupting an image forming process which is in progress to automatically select an image forming process which uses the second developing unit.

Image forming apparatus with removable developing means

An image forming apparatus having an image reading device for receiving image information from an original, an image duplicating device for duplicating an image corresponding to the received image information on a recording medium such as a paper sheet, a magnification rate key for providing a magnification rate with respect to the received image information, a microprocessor for calculating the number of images possible to duplicate on the one paper sheet by the image duplicating device, based on the size of the received image information, the size of the paper sheet and the provided magnification rate and a controller for controlling the image duplicating device to repeatedly perform the image duplicating operation of the number calculated by the microprocessor, such that the image duplicating device duplicates the image of the calculated number on the one paper sheet at the provided magnification rate.

Image forming apparatus in which is calculated the number of images at a

An printer apparatus is provided with keys which allow the easy correction of an operating mistake. When an operation mode requiring entry of a large number of commands or requiring a complicated key operation is established, the user may make an error in command entries. However, such an error can be easily corrected by operating the keys. Accordingly, the manipulation of the image-forming apparatus is easy, and the cost needed to produce copies can be reduced.

Image forming apparatus

A photoelectric converter reads the image of a document line by line. A magnification setting key provided on an operation panel serves to set the copying magnification. When an enlarged magnification is set by the magnification setting key, a magnification processor produces density data of an image to be output, by means of a linear interpolation method, from the image read by the photoelectric converter. When a reduced magnification is set by the magnification setting key, the magnification processor produces density data of the image to be output, by means of a projection method, from the image read by the photoelectric converter. A thermal head transfers ink from an ink ribbon onto a sheet of paper, in accordance with the image density data output from the magnification processor.

Image forming apparatus for forming an image according to magnification

An image forming apparatus is provided with a developing device for developing a latent image formed on the surface of a photosensitive drum. The developing device includes a first developing unit for developing the latent image by use of a first colon developing agent and a second developing unit for developing the latent image by use of a second colon developing agent. The first and second developing units are selectively driven and devices for inserting/removing the first and second development units are also provided. The inserting/removing device includes a handle on the developing unit having first and second hooks which are rotated by the handle to engage pins on the housing of the image-forming apparatus to lock the developing unit in operative relationship with the photosensitive drum.

Image forming apparatus with easily removable developing units

An image-forming apparatus is provided with a photosensitive drum rotatably located in a housing, and a developing device for developing the latent image formed on the surface of the photosensitive drum. A first developing unit of the developing device develops the latent image by a color developing agent. A second developing unit develops the latent image by a second black developing agent. The first and second developing units are alternatively driven by a switch provided on a control panel which is located on the housing. The first developing unit is in the form of a cartridge which can be removably set in the housing. A pair of positioning members are attached to the front and rear walls of the developing agent supply section of the first developing unit. Both end support portions of the handle are swingably mounted on the positioning members by supporting shafts, individually. Each support portion of the handle is fitted with a hook which can rock around its corresponding supporting shaft. The hook engages its corresponding retaining pin on the housing, thereby restraining the handle from moving upward. An engaging recess (a first positioning portion) and an end face (a second positioning portion), both formed on the bottom side of each positioning member, are adapted to engage and abut against positioning pins on the housing, respectively. Thus, the first developing unit is held in a prescribed position.

Removable developing unit for an electrostatic copier and locking device

An image forming apparatus according to this invention, for example, a digital copying machine, comprises an original scanning section, which includes an exposure lamp for exposing the image of an original, a lens unit which can change an image forming magnification when forming the image of the original exposed by the lamp and mirror unit, a photoelectric converter on which an image corresponding to the original image is formed by the original scanning section and which converts the formed image into an electric signal, a main controller for subjecting the electric signal to a predetermined signal processing to electrically change its magnification, and an image forming section for receiving and subjecting the processed signal to another predetermined signal processing to form an image on a sheet which corresponds to the original image. A focal length error of the lens unit caused in the production line is measured in advance, and, based on this measuring result, an error of the original scanning section is stored as compensation data in a non-volatile memory. At the time of changing the magnification of said electric signal by means of the original scanning section and the signal processing, the main controller reads out the compensation data from the memory and compensates for the error of the original scanning section based on this compensation data.

Image forming apparatus with function of auto error correction for

A color image data output section outputs color image data as a main image formed on an image forming medium. A positioning-mark data output section outputs positioning mark data representing a positioning mark to be formed at a predetermined position of the image forming medium for use after the image is formed. An image forming section forms the main image on the image forming medium by using a single- or multi-color agent and, at the same time, forms the positioning mark at the predetermined position of the image forming medium in accordance with the color image data and the positioning mark data.

Image forming apparatus with positioning-mark forming function

An image-forming apparatus is provided with a photosensitive drum rotatably located in a housing, and a developing device for developing the latent image formed on the surface of the photosensitive drum. A first developing unit of the developing device develops the latent image by a first red developing agent. A second developing unit develops the latent image by a second black developing agent. The first and second developing units, each of which includes a developing roller and a magnet roll, are alternatively driven by a switch provided on a control panel which is located on the housing. The respective magnet rolls of the first and second developing units are allowed to rock through about 25 degrees each. As the magnet rolls rock within this range, magnetic brushes of the developing agents can be formed on the surfaces of the developing rollers, respectively, or removed therefrom. When the magnet rolls of the first and second developing units are shifted to the prescribed positions by a magnet roll drive mechanism, the magnetic brushes are formed on the surface of only one of the developing rollers of the first and second developing units.

In one aspect of the present invention, an image forming section forms an image corresponding to the image data on an image receiving medium by selectively using at least first and second image forming media different from each other. A gradation determinator determines first and second gradation methods corresponding to the first and second image forming media which are selectively used. A first gradation section performs gradation conversion corresponding to the first gradation method. A second gradation section performs gradation conversion corresponding to the second gradation method. A controller supplies the image data to the image forming section through the first or second gradation section in response to a determination result from the gradation determinator so that the image forming section forms a halftone-controlled image. In another aspect of the present invention, a color image data output section outputs color image data to be formed on an image receiving medium as a main image. A positioning-mark data output section outputs positioning-mark data to be formed on a predetermined position of the image receiving medium as a positioning-mark to be used after image formation. A gradation section performs predetermined gradation conversion of the color image data. An image forming section forms the main image with halftone control on the image receiving medium using a single- or multicolor image forming medium in accordance with the color image data subjected to gradation conversion and the positioning-mark data, and forms the positioning-mark without halftone control on the predetermined position of the image receiving medium.

Image forming apparatus with halftone control function

An image-forming apparatus is provided with a photosensitive drum rotatably located in a housing, and a developing device for developing the latent image formed on the surface of the photosensitive drum. A first developing unit of the developing device develops the latent image by a first red developing agent. A second developing unit develops the latent image by a second black developing agent. The first and second developing units are alernatively driven by a switch provided on a control panel which is located on the housing. A copy mode for black is automatically established when the power is turned on or if no operation is performed for a prescribed time after a foregoing copying operation, in a mode for any other color than black, is ended.

In a color picture image forming apparatus wherein manuscript picture image data read optically is decomposed into color signals of a plurality of types, the color decomposed picture image data is temporarily stored in a memory device, and a picture image recording device is driven by the stored picture image data for reproducing on a copying paper a color picture image corresponding to a manuscript picture image, at the time of enlarging or reducing the size of the picture image, a read address signal of the memory device corresponding to a set magnification or reduction degree is formed, and the read address signal thus formed is supplied to the memory device thereby enlarging or reducing the size of the reproduced color picture image. The color data, which may be RGB data, is stored sequentially in the memory means and is selectively read out in accordance with previously-determined read control data determined on the basis of the set magnification or reduction degree. Some of the color data may be read out more than once when the image is to be magnified, while some of the color data may be skipped when the image is to be reduced.

Apparatus for magnifying or reducing a color image in which

A copying machine for copying a document at a preset copying magnification and a preset copying density on a preset number of copying paper sheets fed from a selected paper feed cassette of a plurality of paper feed cassettes which are detachably loaded in the machine. The copying machine has a storing means for temporarily storing current copying instructions (e.g., copying paper size, copying number, copying magnification and copying density) in accordance with an interrupt copying command, a setting means for setting the copying instructions other than the copying paper size to standard instructions in accordance with the interrupt copying instruction, and a readout means for reading out the stored current copying instructions from the storing means when the interrupt copying operation ends.

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Ebina, Japan

Yasuo Abuyama